using Grpc.Core;
using Grpc.Health.V1;
using Grpc.Net.Client;
using System;
using System.Threading;
using System.Threading.Tasks;

using var channel = GrpcChannel.ForAddress("https://localhost:5001");
var client = new Health.HealthClient(channel);

Console.WriteLine("Watching health status");
Console.WriteLine("Press any key to exit...");

var cts = new CancellationTokenSource();
using var call = client.Watch(new HealthCheckRequest { Service = "" }, cancellationToken: cts.Token);
var watchTask = Task.Run(async () =>
{
    try
    {
        await foreach (var message in call.ResponseStream.ReadAllAsync())
        {
            Console.WriteLine($"{DateTime.Now}: Service is {message.Status}");
        }
    }
    catch (RpcException ex) when (ex.StatusCode == StatusCode.Cancelled)
    {
        // Handle cancellation exception.
    }
});

Console.ReadKey();
Console.WriteLine("Finished");

cts.Cancel();
await watchTask;
